微孔交联淀粉的制备及其对Zn(Ⅱ)的吸附FIRT和XRD分析.docx

微孔交联淀粉的制备及其对Zn(Ⅱ)的吸附FIRT和XRD分析
摘要
本文以玉米淀粉为原料，通过微生物发酵、颗粒化、烘干、糖化等步骤制备出微孔交联淀粉，并利用其对Zn(Ⅱ)的吸附性能进行了研究。结果表明，微孔交联淀粉对Zn(Ⅱ)具有较好的吸附性能，吸附量随Zn(Ⅱ)初始浓度、pH值和温度的增加而增加。同时，FIRT和XRD分析表明微孔交联淀粉的孔隙结构和晶体结构均得到了改变，这些改变有助于提高其对Zn(Ⅱ)的吸附性能。本研究为微孔交联淀粉在环境治理等领域的应用提供了理论基础。
关键词：微孔交联淀粉；Zn(Ⅱ)；吸附性能；FIRT；XRD
Abstract
Inthispaper,micron-structuredcross-linkedstarchwaspreparedusingcornstarchastherawmaterialthroughmicrobialfermentation,granulation,drying,andsaccharification,anditsadsorptionperformanceforZn(Ⅱ)wasstudied.Theresultsshowedthatthemicron-structuredcross-linkedstarchhadgoodadsorptionperformanceforZn(Ⅱ),andtheadsorptionamountincreasedwiththeincreaseofZn(Ⅱ)initialconcentration,pHvalue,andtemperature.Meanwhile,FIRTandXRDanalysisindicatedthattheporestructureandcrystalstructureofthemicron-structuredcross-linkedstarchhadbeenchanged,whichcouldimproveitsadsorptionperformanceforZn(Ⅱ).Thisstudyprovidesatheoreticalbasisfortheapplicationofmicron-structuredcross-linkedstarchinenvironmentalgovernanceandotherfields.
Keywords:micron-structuredcross-linkedstarch;Zn(Ⅱ);adsorptionperformance;FIRT;XRD
1Introduction
Withthedevelopmentofindustryandagriculture,heavymetalpollutionhasbecomeaseriousenvironmentalproblem.Zinc(Zn)isoneofthemostwidelyusedheavymetalsinindustryandagriculture,anditsreleaseintotheenvironmentcancauseseriousharmtohumanhealthandtheecologicalenvironment[1].Therefore,theremovalofZnfromwastewaterhasbecomeanimportantresearcharea.
Atpresent,variousmethodshavebeendevelopedforheavymetalremoval,includingchemicalprecipitation,adsorption,ionexchange,electrochemicaltreatment,andmembraneseparation[2].Amongthem,adsorptionisawidelyusedandeffectivemethodduetoitshighremovalefficiency,lowcost,andsimpleoperation[3].
Starchisawidelyusednaturalpolymermaterial,anditsuniqueporousstructuremakesitapromisingadsorbentforheavymetalremoval[4].However,theinherenthydrophilicityofstarchlimitsitsapplicationinwastewatertreatment.Inordertoovercomethislimitation,researchershaveexploredthemodificationofstarchtoimproveitsadsorptionperfo